Aquarium



FIG. 1 is a side elevational view of an aquarium showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof; and,

FIG. 5 is a slightly enlarged bottom perspective view thereof. 

The ornamental design for an aquarium, as shown and described. 